Loans - Major classifications (Details) - USD ($)	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2017
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	$ 261,167,368	$ 265,322,959
Less: allowance for loan losses	(1,293,965)	(1,324,159)	$ (1,879,304)
Total loans, net	259,873,403	263,998,800
Construction, Land, Development
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	4,318,845	4,845,372
Less: allowance for loan losses	(4,319)	(4,758)	(83,955)
Total loans, net	4,314,526	4,840,614
1-4 Family Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	124,845,322	122,598,962
Less: allowance for loan losses	(67,593)	(7,300)	(53,630)
Total loans, net	124,777,729	122,591,662
1-4 Family Non-Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	20,968,812	23,836,875
Less: allowance for loan losses	(26,630)	(71,053)	(121,274)
Total loans, net	20,942,182	23,765,822
Multifamily
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	73,246,392	71,100,731
Less: allowance for loan losses	(109,870)	(71,101)	(60,883)
Total loans, net	73,136,522	71,029,630
Commercial Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	8,508,011	7,351,591
Less: allowance for loan losses	(61,193)	(131,906)	(161,819)
Total loans, net	8,446,818	7,219,685
Commercial Non-Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	19,502,545	24,211,269
Less: allowance for loan losses	(738,366)	(925,355)	(799,632)
Total loans, net	18,764,179	23,285,914
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	9,777,441	11,378,159
Less: allowance for loan losses	(70,058)	(98,096)	$ (164,440)
Total loans, net	$ 9,707,383	$ 11,280,063